From mboxrd@z Thu Jan 1 00:00:00 1970 From: balbi@ti.com (Felipe Balbi) Date: Mon, 21 Jul 2014 10:10:43 -0500 Subject: [PATCH 8/9] usb: phy: am335x: call usb_gen_phy_init()/usb_gen_phy_shutdown() in am335x_init()/am335x_shutdown() In-Reply-To: <20140721100307.21172b65@ipc1.ka-ro> References: <1405675890-8802-2-git-send-email-LW@KARO-electronics.de> <1405675890-8802-3-git-send-email-LW@KARO-electronics.de> <1405675890-8802-4-git-send-email-LW@KARO-electronics.de> <1405675890-8802-5-git-send-email-LW@KARO-electronics.de> <1405675890-8802-6-git-send-email-LW@KARO-electronics.de> <1405675890-8802-7-git-send-email-LW@KARO-electronics.de> <1405675890-8802-8-git-send-email-LW@KARO-electronics.de> <1405675890-8802-9-git-send-email-LW@KARO-electronics.de> <20140718135713.GH24914@saruman.home> <20140721100307.21172b65@ipc1.ka-ro> Message-ID: <20140721151043.GF6852@saruman.home> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi,, On Mon, Jul 21, 2014 at 10:03:07AM +0200, Lothar Wa?mann wrote: > Hi, > > > On Fri, Jul 18, 2014 at 11:31:29AM +0200, Lothar Wa?mann wrote: > > > This patch makes it possible to use the musb driver with HW that > > > requires external regulators or clocks. > > > > can you provide an example of such HW ? Are you not using the internal > > PHYs ? > > > The Ka-Ro electronics TX48 module uses the mmc0_clk pin as VBUSEN > rathern than usb0_drvvbus. This patch makes it possible to use an > external regulator to handle the VBUS switch through the 'vcc-supply' > property of the underlying generic_phy device. OK, I get it now. But why would not use usb0_drvvbus ? You could still route usb0_drvvbus to the regulator enable pin and the regulator would be enabled for you once correct values are written to the IP's mailbox. I suppose this has something to do with layout constraints ? cheers -- balbi -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: